Carton closure



. proof.

Patented oct. 14, 1947 i l I I UNITED STATES PATENT OFFICE CARTONCLOSURE Reynolds Guyer, St. Paul, Minn., assignor to Waldorf PaperProducts Company, St. Paul, Minn., a corporation of MinnesotaApplication January 19, 194;; Serial No. 518,843 9 Claims. 229-31) Myinvention relates to an improvement in in the fact that the fold ofcarton stock along carton closure wherein it is desired to provide theone seam where leakage can most readily a means for rendering cartonsrelatively leakoccur forms a wall thickness of several plies at In myprevious application, Serial No. 477,845, forcing the container at thispoint. The extension d March 3, 1943, I described a carton for conof thefold into the interior of the container also taining liquid productsto'be frozen. This carton makes it more difiicult for liquid to seepfrom in preferred form comprises a rectangular tray the container alongthe upper end wall seam.

having diagonally folded corner gussets and a In the form ofconstruction illustrated the top closure having an opening therethroughl0 container comprises five panels of stock, two of I through which thecarton could be filled. As the which are overlapped to form arectangular body the body of the carton was formed in the shape ofreadily be formed with little likelihood of leakage a tray havingdiagonally creased corners, no leakbetween the two overlapped andconnected panels. age could occur through this lower portion of the Bysubsequently folding the corners of the concontainer. In handling thecartons after the tainer so as to form the lower portion of the movementof the container had a tendency toportion of the container is virtuallyimpossible cause the liquid within the container to surge if the stockis water-proof. As a result nly from one end to the other thereof. Thissurging those seams through which no leaka e may o cur of liquid withinthe container causes a certain with relative ease, are allowed to remainin the seepage from the container at the structure. These seams in theconstruction ilends thereof between the end walls of the conlustratedlie along the upper edges of the end tainer and the end flaps of the topclosure. Thus Wail- By Providing a fold o te a nwardly while thecontainers were relatively liquid tight of th e se ms, the seams arereinforced and less this surging'action of the liquid during moveeaka ewill therefore result.

ment of the container sometimes forced a cer- These n h r bj t and nov leatures of tain amount of liquid into the end flap construcmy inventionWill be m ea y a fu ly set tion, wasting a certain amount of the liquidand so forth in t following fica n and claims.

causing some slight leakage therefrom. In t e d aw gs forming a p t Of yp fi- The object of the present invention is to overcationi come thispreviously encountered difficulty. This igure 1 is a pe s V ew of acontainer I accomplish by providing a fold material proin C pleted setup fO jecting into the interior of the container near Figure 2 is alongitudinal se ion hr u h the 1 each end thereof at the junctionbetween the end container showing the s u n th r f.

surging of liquid within the container and also 40 Seamtends toreinforce the container along the seam re 4 is a diagrammatic view ofthe blank of between the end wall and the top closure to prewhich theContainer is formed. vent leakage at this point. Figure 5 is alongitudinal section througha A feature of the present invention lies inthe modified form of Carton Construction. act that the fold of materialextends into the Figure 6 's an enlarged view through one of theinterior of th c tain r near th ends thereof end walls of the containerillustrated in Figure 5.

and provides a guard against which liquid may Figure 7 is a diagrammaticview of the carton surge during handling of the c t i filled blank ofwhich the carton illustrated in Figure 5 with liquid. This fold acts toreinforce the con is formedtainer along the upper end seam and preventsThe carton A, illustrated in Figures 1 through the entire weight of theliquid within the con- 4 Of the drawings, includes a top C o Paneltainer from pressing against the container end I 0 connected alon a fo dline I l to a side wall wall. panel l2. The side wall panel I2 isconnected A further feature of the present invention along a fold linel3 to the bottom panel [4. The resides in the fact that the reinforcingfold may bottom panel 14 is connected along a fold line he formed as anintegral part of the top closure l5 to a side wall panel [6 which inturn is of the container or may be formed as a part of connected along afold line I! to the top closure the end wall of the container. Eachstructure panel l9 which designed to extend in underlaphas itsindividual advantages over the other. ping relation with the panel l0.Strips of A further feature of the present invention lies moisture-proofadhesive 20 are coated upon the panel l9 as illustrated, or upon theundersurface of the panel I0, and the container is formed into tubularrelation by overlapping the panel Ill with the panel l9.

The containers are usually shipped in this flat formation with thepanels in and I9 secured An end wall panel 20 is connected to one end ofthe panel |4 along the fold line 2|, while a panel 22 is connected tothe other end of the bottom panel l4 along a fold line 23. A flap orflange 24 is connected to the end wall 20 along the double creased lines25, while the flap or flange 26 is connected to the panel 22 along thedouble fold line 21;

Corner members 29 are foldably connected along fold lines 30 to the endwall panel 20 and are connected along fold lines 3| to the side walls I2and H5 respectively. members 32 are connected along fold lines 33 to theend panel 22 and are connected along fold lines 34 to the side wallpanels |2 and I6, respec tively. The corner members 29 and 32 arediagonally creased along diagonal fold lines, indicated by the numeral35.

The top closure panel I is connected along a fold line 35 to a flange31, which in turn is connected along a fold line 39 to a second flange4|] slightly wider than the flange 31. A flange 40 is connected along afold line flange 42.

At the opposite end of the panel H), a flange 43 is connected along afold line 44 to the panel l0, and this flange 43 is also connected alonga fold line 45 to a second flange 46 similar to the flange 43, butslightly wider than the same. A flange 45 is connected along a fold line41 to the end flange 49.

A substantially rectangular hinged closure 55 is die cut from the bodyof the panel l9, being connected thereto along a creased hinge line Aclosure panel 52 is similarly cut from the panel l0, being connectedthereto along the creased fold line 53. When the panels l0 and I9 are inoverlapped relation the fold lines '5| and 53 coincide, but the closure52 is somewhat larger than the closure 50, forming an oil-set betweenthe two closure panels. The closure panels 50 and 52 are connectedtogether by a portion of an adhesive strip 20 so as to pivot in unison,but the smaller opening of the panel 50 forms a ledge upon which themarginal edge of the larger panel 52 may rest.

The manner in which the carton blank is folded into tubular relation hasbeen mentioned. In assembling the carton for use, the end walls 20 and22 are folded up into substantially right angular relation with thebottom panel l4, the corner gusset forming members 29 and 32 foldingalong the fold lines 35. A substantially triangular flap of doublethickness is thus formed connected along a vertical line to each end ofeach end wall 20 and 22.

The closure panel H) is folded along the fold lines 36 and 44, and thematerial is doubled back on itself along the fold lines 39 and 45 so asto provide folds of double thickness stock at each end of the container.As illustrated in Figures 2 and 3 of the drawings, this double thicknessfold extends inwardly of the container, the wider flange of each fold,4|] and 46 respectively, urging the double fold toward the under-surfaceof the panel I9. The outer flanges 42 and 49 are then folded down overthe triangular corner gusset members 29 and 32 and overlie the marginalflanges 24 and 26 on the end walls 4| to the end Corner gusset forming20 and 22. flaps which are a carton construction 13 The flaps 42 and 49may then be secured in position by any suitable means such as by the useof tape strips 54 which hold the corners in proper formation Thus it isseen that a double thickness fold is provided along the upper edge ofeach end wall which is the only point where leakage might readily occur.This double fold reinforces the seam against the surge of liquid withinthe container and also provides a firmer connection between the flaps onthe end wall panel and on the top closure panel respectively. It willbeen seen that should the flanges issuing from the top panel l0 folddirectly over the flanges 24 and 26 on the end walls 20 and.,,22,respectively, there would be no contact between these flaps before thecenter of the fold between the end wall panels 20 and 22 and the flanges24 and 25. With the present construction contact occurs throughout alongitudinal area of the curve, thus increasing the effectiveness of theseal at this point a considerable extent.

In Figures 5, 6. and '1 of the drawings I disclose which difiersslightly in construction from that illustrated in Figures 1 through 4.The carton 13 includes a top closure panel 55, a side wall panel 55,bottom closure panel 51, side wall panel 59, and underlapping closurepanel Gil connected in the order stated by parallel fold lines 6|, 52,G3 and 64. The end wall panels 85 are connected to opposite ends of thebottom panel 51 along fold lines 66. Corner gussets, from which members61 are connected along fold lines 59 to the opposite ends of the endpanels 65, are connected along fold lines 19 to the side wall panels 56and 59. The corner gusset forming members 61 are provided with diagonalfold lines 1| along which the corner members may fold into triangularflaps foldable to overlie the end walls 65.

Flanges 12, 13, and 14 are connected to the end walls 55, the flange 12being connected thereto by a fold line 15. The flanges 12 and 13 areseparated by a fold line 15. while the flanges 13 and 14 are separatedby the fold line 11. The fold lines 15, 16, and 11 are parallel to eachother, and to the fold line 56 connecting the end panel 65 to the basepanel 51.

Flaps 19 are connected to the top closure panel 55 along fold lines 89.The folds are substantially aligned'with the fold lines 66 and 10. Ahinge closure panel 8| is cut from the body of the panel 6|] and isconnected thereto along the fold line 82. Aslightly larger dimensionhinge closure panel 83 is out from the body of the top closure panel 55and 5 connected thereto along the fold line 84. The panel 60 overlapsthe panel 55 and is adhered thereto by suitable means, such as thestrips of adhesive 85. The iold lines 82 and 84 coincide and the hingeclosure panels 8| and 83 are secured together to open in unison, themarginal edges of the larger panel 83 resting upon the body of the panel60 surrounding the hinged closure panel 8|.

In assembling the carton B, the flanges 12 and 13 are folded so thatthese flanges lie parallel in superimposed relation. The end panels 55are then erected into substantially right angular relation with thebottom panel 51, the double thickness fold formed by the flanges 12 and13 extending into the body of the carton and underlying theunder'suriace of the panel 69. As the end walls 65 are erected thecorner members 61 fold along the diagonal fold lines 1| to formtriangular folded to overlie the outer surface I of the end wall 65. Theflaps or flanges 14 are overlie these triangular corner the top foldeddown to guard and also as agseal for the contents of the carton.

and extending into proximity with the opposite body wall, a doublethickness fold hingedly connected to the edge of said closure wall andexan end Wall of said carton, double thickness fold folded over andlying outwardly of said end wall.

5. A carton comprising a tray shaped body including a bottom panel, sidewall panels foldably els. connecting diagonally folded corner gussetsbetween saicl'end walls and said side walls, said adopted to foldoutwardly of said 7. A carton eluding a base panel,

adjacent end wall, p on said double thickness fold folded outwardly ofthe gusset portions of the adjacent end Wall.

REYNOLDS GUYER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 631,642 Morgan Nov. 21, 1899610;4'74 CoWles Sept. 6,1398

2,041,932 Hutchins, Jr May 26, 1936 906,780 Davis Dec. 15, 1908 FOREIGNPATENTS Number Country Date 4,888 Great Britain Oct. 5, 1905

